CloudWatch Log Management - "An error occurred while describing log groups" timeout after 611732 ms

The timeout error you're experiencing when accessing CloudWatch Log Management suggests that the request to describe log groups is taking too long to complete and eventually timing out. This type of timeout error typically occurs when the service is unable to retrieve the log group information within the expected timeframe.

Here are some steps to help resolve this issue:

Check Service Status: Verify that CloudWatch Logs service is operating normally in your region. Temporary service disruptions can cause timeout errors.

Reduce the Scope: If you have a large number of log groups in your account, try accessing them through the AWS CLI with filters to narrow down the results, rather than loading all log groups at once in the console.

Try Again Later: Since timeout errors can be transient, wait a few minutes and try refreshing the console. The service may be experiencing temporary high load.

Use AWS CLI: As an alternative, you can use the AWS CLI to describe your log groups with the aws logs describe-log-groups command. This can help you determine if the issue is specific to the console or affects the API as well.

Check Your Network: Ensure your internet connection is stable and that there are no network issues between your location and AWS services.

Clear Browser Cache: Sometimes browser cache or cookies can cause console issues. Try clearing your browser cache or using a different browser or incognito mode.

If the problem persists after trying these steps, you can add correspondence to your existing case through the AWS Support Center at https://console.aws.amazon.com/support/ with additional details about when the issue started and any recent changes to your account. You may also want to review your AWS Support plan options if you need faster response times for issues like this.
Sources
Common Error Types - Amazon CloudWatch Logs